define([
    'jquery'
], function ($) {
    return $.extend({
            hotkeys: {
                version: "0.8",

                specialKeys: {
                    8: "backspace", 9: "tab", 13: "return", 16: "shift", 17: "ctrl", 18: "alt", 19: "pause",
                    20: "capslock", 27: "esc", 32: "space", 33: "pageup", 34: "pagedown", 35: "end", 36: "home",
                    37: "left", 38: "up", 39: "right", 40: "down", 45: "insert", 46: "del",
                    96: "0", 97: "1", 98: "2", 99: "3", 100: "4", 101: "5", 102: "6", 103: "7",
                    104: "8", 105: "9", 106: "*", 107: "+", 109: "-", 110: ".", 111: "/",
                    112: "f1", 113: "f2", 114: "f3", 115: "f4", 116: "f5", 117: "f6", 118: "f7", 119: "f8",
                    120: "f9", 121: "f10", 122: "f11", 123: "f12", 144: "numlock", 145: "scroll", 191: "/", 224: "meta"
                },

                shiftNums: {
                    "`": "~", "1": "!", "2": "@", "3": "#", "4": "$", "5": "%", "6": "^", "7": "&",
                    "8": "*", "9": "(", "0": ")", "-": "_", "=": "+", ";": ": ", "'": "\"", ",": "<",
                    ".": ">", "/": "?", "\\": "|"
                }
            },
            keyHandler: function (handleObj) {
                // Only care when a possible input has been specified
                if (typeof handleObj.data !== "string") {
                    return;
                }

                var origHandler = handleObj.handler,
                    keys = handleObj.data.toLowerCase().split(" "),
                    textAcceptingInputTypes = ["text", "password", "number", "email", "url", "range", "date", "month", "week", "time", "datetime", "datetime-local", "search", "color"];

                handleObj.handler = function (event) {
                    // Don't fire in text-accepting inputs that we didn't directly bind to
                    if ($ !== event.target && (/textarea|select/i.test(event.target.nodeName) ||
                        $.inArray(event.target.type, textAcceptingInputTypes) > -1)) {
                        return;
                    }

                    // Keypress represents characters, not special keys
                    var special = event.type !== "keypress" && $.hotkeys.specialKeys[event.which],
                        character = String.fromCharCode(event.which).toLowerCase(),
                        key, modif = "", possible = {};

                    // check combinations (alt|ctrl|shift+anything)
                    if (event.altKey && special !== "alt") {
                        modif += "alt+";
                    }

                    if (event.ctrlKey && special !== "ctrl") {
                        modif += "ctrl+";
                    }

                    // TODO: Need to make sure this works consistently across platforms
                    if (event.metaKey && !event.ctrlKey && special !== "meta") {
                        modif += "meta+";
                    }

                    if (event.shiftKey && special !== "shift") {
                        modif += "shift+";
                    }

                    if (special) {
                        possible[modif + special] = true;

                    } else {
                        possible[modif + character] = true;
                        possible[modif + $.hotkeys.shiftNums[character]] = true;

                        // "$" can be triggered as "Shift+4" or "Shift+$" or just "$"
                        if (modif === "shift+") {
                            possible[$.hotkeys.shiftNums[character]] = true;
                        }
                    }

                    for (var i = 0, l = keys.length; i < l; i++) {
                        if (possible[keys[i]]) {
                            return origHandler.apply(this, arguments);
                        }
                    }
                };
            },
            initialize: function () {
                $.each(["keydown", "keyup", "keypress"], function () {
                    $.event.special[this] = {add: $.keyHandler};
                });
            }
        }
    );
});